fix(receipt-import): route egg items away from allergy dairy

backend/src/receipt-import/receipt-import.service.ts

@@ -515,6 +515,28 @@ export class ReceiptImportService {
       if (fallbackHit) return fallbackHit;
     }
 
+    // ── Regel: Ägg (saknar egen L2/L3 i nuvarande träd) ────────────────
+    const hasEggSignal =
+      /\bagg\b/.test(normalized) ||
+      /\begg\b/.test(normalized) ||
+      /\binne\b/.test(normalized) ||
+      /\b24p\b/.test(normalized);
+
+    if (hasEggSignal) {
+      const l1DairyEgg = categories.find(
+        (c) => c.path.toLowerCase() === 'mejeri, ost & ägg',
+      );
+      if (l1DairyEgg) {
+        return {
+          categoryId: l1DairyEgg.id,
+          categoryName: l1DairyEgg.name,
+          path: l1DairyEgg.path,
+          confidence: 'high',
+          usedFallback: false,
+        };
+      }
+    }
+
     // ── Regel: Te ────────────────────────────────────────────────────────
     const isTea =
       /\bte\b/.test(normalized) ||
@@ -693,6 +715,30 @@ export class ReceiptImportService {
       }
     }
 
+    const hasEggSignal =
+      /\bagg\b/.test(normalized) ||
+      /\begg\b/.test(normalized) ||
+      /\binne\b/.test(normalized) ||
+      /\b24p\b/.test(normalized);
+
+    if (hasEggSignal && suggestion.path.toLowerCase().includes('allergi mejeri')) {
+      const l1DairyEgg = categories.find(
+        (c) => c.path.toLowerCase() === 'mejeri, ost & ägg',
+      );
+      if (l1DairyEgg) {
+        this.logger.log(
+          `AI contradiction-guard: "${rawName}" remappas från "${suggestion.path}" till "${l1DairyEgg.path}"`,
+        );
+        return {
+          categoryId: l1DairyEgg.id,
+          categoryName: l1DairyEgg.name,
+          path: l1DairyEgg.path,
+          confidence: 'high',
+          usedFallback: true,
+        };
+      }
+    }
+
     const hasCreamSignal =
       /\bvispgradde\b/.test(normalized) ||
       /\bmatlagningsgradde\b/.test(normalized) ||